Polygonum Genus
Polygonum bellardii Narrowleaf Knotweed
Polygonum arenarium Lesser Red Knotgrass
Polygonum bistorta
Polygonum orientale
Polygonum salicifolium
Polygonum douglasii Douglas's Knotweed
Polygonum oxyspermum Strand Vogelknterich
Polygonum maritimum Sea Knotgrass
Polygonum equisetiforme Horsetail Knotweed
Polygonum paronychia Dune Knotweed
Polygonum arenastrum Oval Leaf Knotweed
Polygonum minimum Broadleaf Knotweed
